Matrix Clock

Introduction

The Matrix clock is a single board, Arduino compatible clock that displays the time on an LED matrix display.

Description

Based on the Arduino Leonardo the Matrix Clock is fully compatible with the Arduino IDE and can be easily updated or customised with new sketches, uploaded via a USB Micro cable. A coin cell powered Real Time Clock Calendar keeps track of the time and date when the unit in not powered. The Matrix Clock can also play musical alarms that can be easily reprogrammed with different tunes. Due to its compact form factor the Matrix clock could be fitted in any number of housings even a pocket watch style housing. If portability is desirable then the unit can be battery powered, a sleep function is available (by taking one of the expansion pins to ground) in order to extend battery life.

Features

16x8 LED Matrix display
ATMEGA32U4 microcontroller
Coin cell powered Real Time Clock Calendar
Texas Instruments TLC5920 LED driver
4 Buttons
Piezo speaker output
Sleep mode input
2 power inputs, USB Micro connector or 6V - 9V DC in. (Normal powered by Vin switches when USB power is present).

Instructions

Specifications

Microcontroller	Atmel ATmega32u4 in TQFP-44 package
Operating Voltage	5V USB powered or 6V to 9V
Power and communications	USB Micro B
Current	Approx 90mA average during normal operation Max. 300mA
LED Matrix	2x 8x8 3mm green LEDs
Clock speed	Microcontroler 16MHz, RTCC 32.7
SRAM	2.5 KB
EEPROM	1 KB
Flash Memory	32 KB
Expansion Header	Gnd, Vin, 5V, Sleep, Piezo-, Pezo+